/*
 * The MIT License
 *
 * Copyright 2014 David Rodenas Pico.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package edu.uoc.sd.fr14.imesg;

import java.io.Serializable;

import edu.uoc.sd.fr14.actors.Server;
import edu.uoc.sd.fr14.mesg.MessageForServer;
import edu.uoc.sd.fr14.mesg.TargetId;
import edu.uoc.sd.fr14.mesg.TargetedMessage;
import edu.uoc.sd.fr14.model.Nseq;
import edu.uoc.sd.fr14.model.ServerId;

/**
 * Message to send to another server to recover operations missing.
 * 
 * @see Server#recover(Nseq, boolean, ServerId)
 * @author drodenas
 */
public class RecoverMessage extends TargetedMessage implements MessageForServer,Serializable {
	private static final long serialVersionUID = 3511069296850277629L;
    protected RecoverMessage() { this.nseq = null; this.leader = false; this.from = null; } // for serializer
	
	private final Nseq nseq;
    private final boolean leader;
    private final ServerId from;

    /**
     * Message to send to another server to recover operations missing.
     * 
     * @param target from wich server we want to recover a part of its operation log 
     * @param nseq   since which operation log position
     * @param leader if i am leader
     * @param from   my server id
     * @see Server#recover(Nseq, boolean, ServerId)
     */
    public RecoverMessage(TargetId target, Nseq nseq, boolean leader, ServerId from) {
        super(target);
        if (nseq == null) throw new NullPointerException("Illegal argument: nseq cannot be null");
        if (from == null) throw new NullPointerException("Illegal argument: from cannot be null");        
        
        this.nseq = nseq;
        this.leader = leader;
        this.from = from;
    }
    
    @Override
    public void apply(Server server) {
        server.recover(nseq, leader, from);
    }

    @Override
    public String toString() {
        return "recover("+nseq+","+leader+","+from+")>"+getTarget();
    }

}
